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The crystallisation of alkaline‐earth metal tungstates from metal chloride melts: solubility – temperature phase diagram studies
Author(s) -
Packter A.
Publication year - 1982
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170170323
Subject(s) - solubility , tungstate , chemistry , alkaline earth metal , inorganic chemistry , alkali metal , magnesium , phase diagram , strontium , barium , potassium , phase (matter) , strontium chloride , sodium , metal , chloride , sodium tungstate , tungsten , organic chemistry
The solubility vs temperature phase diagrams, for magnesium, calcium, strontium and barium tungstate solutions in lithium, sodium, potassium chloride melts and in the alkalineearth metal chloride melts, have been analysed. The solution in the alkali metal chloride melts are pseudo‐binary reciprocal ternary mixtures; the more soluble barium tungstate systems show small deviations from ideality, while the less solube magnesium tungstate systems show marked deviations from ideality, especially in sodium and potassium chloride melts. These deviations are related to electrostatic effects in solution, that depend on some function of reciprocal solute and solvent cation radii. The solutions in the alkaline‐earth metal chlorids melts are binary mixtures with no solvate formation; these systems show some from ideality at low mole fractions ( x = 0.1 to 0.25) but they are practically ideal at mole fractions from 0.25 to 0.6.